Author: Zen and the Art of Computer Programming
1 Introduction
JavaScript is an object-based and event-driven scripting language. Its syntax is similar to Java and C, easy to learn and powerful. In recent years, with the continuous development of front-end technology, more and more people have begun to pay attention to and use JavaScript for web development. As a JavaScript expert, software engineer or architect, you need to master it and be able to use it to build more complex web applications. This book aims to help readers understand JavaScript so that they have good coding skills. By reading this book, you can become familiar with the JavaScript API in the browser, write runnable code, solve practical problems, and improve your programming skills. This book will give a comprehensive introduction to JavaScript, covering the following aspects:
- History of JavaScript Development
- Build the operating environment
- JavaScript API in the browser
- Data Types and Operators
- Functions, Scope, and Closures
- Objects and the prototype chain
- asynchronous programming
- Node.js Basics
- Modular
- Frameworks and Libraries
- testing and debugging
- Ways to improve code quality
- Summary and Summary
2. History of JavaScript development
JavaScript was born in 1995, developed by Netscape Corporation, and launched in 1997. So far, more than 100,000 pieces of JavaScript code have been written. Due to its simplicity and flexibility, it quickly became an enterprise-level development language. Due to the high efficiency of JS, it is widely used in web and mobile applications.
3. Build the operating environment
Online editor IDE
If you are a novice, you can try using JavaScript in the online editor. Such as CodePen